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DrTebi

D-Link Wireless Access Point DWL-3200AP MAC Address Filter Hack

Since the last firmware update (version 2.56-rc550) to the wireless access point D-Link DWL-3200AP, MAC address filters cannot be entered through the web interface anymore. It turns out that there is a bug in the JavaScript method that checks the MAC address.

The following hack circumvents the faulty method, and allows to enter a MAC address through a web browser:

  • Open Firefox
  • Open http://192.168.0.50/ and login
  • Navigate to Advanced Settings → Filters → Wireless MAC ACL
  • Right-Click anywhere to the immediate right of the input fields and select This Frame → Show Only This Frame
  • Now press Ctrl+Shift+K to open the Web Console
  • On the bottom right, at the input command, enter:

function macCheck_X() { return true; }

  • Now use the Wireless MAC ACL form as intended; be sure to put in a valid MAC address, since there is no error-checking in place anymore.
  • Finally click on System, and then Restart and OK to apply the new settings.

An alternative method is to login through telnet or ssh, and use the appropriate commands to enter MAC ACL filters.

DrTebi, June 2016